Each fixture is 4 bulbs and they can be daisy chained together. Each bulb is 110 watts, 1 amp, so up to 16 bulbs can be run on a 20 amp circuit. I'm running 4 fixtures, 16 bulbs total, over a 4' x 8' area. Down the road I may add another fixture with 4 more bulbs but I want to do at least one more grow with them first. Currently I'm running three 2700ks and one 6500 bulb in each fixture. They do put out more heat than LEDs but far less than a comparable amount of HPS. They run both the 110 watt XHO bulbs as well as the 95 watt VHOs.
The manufacturer/wholesaler site has complete specs:
http://www.ncwgs.com/product_info.php?cPath=43&products_id=1637. This is the same manufacturer who is now manufacturing the Bad Boy T5 HOs.
Best price I've found on them is here:
http://www.plantlightinghydroponics.com/uno-vho-t5-lighting-system.html